Improvement in the electro-deposition of metals



UNITED STATES PATENT QFFIOE.

Y ISAAC ADAMS, JR, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN THE ELECTRO-DEPOSITION OF METALS.

Specification forming part of Letters Patent No. 100,961, dated March 22, 1870.

To all whom it may concern:

Be it known that I, IsAAo ADAMS, J r., of Boston, in the State of Massachusetts, have invented an Improvement in the Electro-Deposition of Nickel.

nia alum, the three difl'erent varieties of com-- mercial alum; second, a solution formed of the double sulphate of nickel and potash; third, a solution formed of the double sulphate of nickel and magnesia, with or without an excess of ammonia.

In Letters Patent of the United States granted to me 3d of August, 1869, I have fully set out the difficulties which before my invention therein described had existed -in ob-- taining a thick and suflicient coating of reguline nickel by electro-deposition.- I therein claimed as my invention the electro-deposition of nickel by means "of a solution of the doublej sulphate of nickel and ammonia, ora solution of the double-chloride of nickel andammonium, prepared and used in such a manner as to be free from the presence of potash", soda, alumina, lime, or nitric acid,,or from any acid or alkaline reaction. I have since found that a good coating of nickel can be deposited by the battery process from the solutions hereinbefore mentioned, provided they are prepared and used in sucha manner as to be free from any acid or alkaline reaction.

In preparing these solutions commercial nickel can be purified as described at length in hereinbefore-mentioned .patent,-a'nd then the solution herein described can vbe made by processes known generally .to chemists, taking care always that the solution is free from any acid or alkalinereaction.

When these solutions are used great care must be taken lest by the use of too high battery power, or from the introduction of some foreign matters, the solution becomes acid or alkaline.

I prefer to use these solutions at atemperature above l00 Fahrenheit, but do not limit my invention to the use of these solutions at that temperature.

I therefore elai1n 1. Theelectro-deposition of nickel by means of a solution of the double-sulphate of nickel and alumina, prepared andiused in such a manner as to be free from the presence of ammonia, potash, soda, lime, or nitric acid,

or from anyacid or alkaline reaction.

2. The electro-deposition of nickel by means of a solution of the double sulphate of nickel and potash, prepared and used in such a manner asto befree from the presence of ammonia, soda,.alumina, lime, or nitric acid, or from any aeid'or alkaline reaction.

3. The electro-deposition of nickel by means of a solution of the double sulphate of nickel and magnesia, prepared and used-in" such amanner as to be free from the presence of potash, soda, alumina, lime, or nitric acid, or from any acidvor alkaline react-ion.

p The above. specification of my invention signed and witnessed at London this 1st day of February, A. I). 1870., v ISAAC ADAMS, JR.

Witnesses:

E. A. QUINTARD, R. O. CUTTING. 

